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一分钟快速定位Android启动耗时问题

作者：字节小站

做开发除了实现功能,还要注重优化,性能优化包括的东西还是非常多的,下面这篇文章主要给大家介绍了关于如何通过一分钟快速定位Android启动耗时问题的相关资料,需要的朋友可以参考下

前言

Tencent Matrix默认无法监测Application冷启动的耗时方法，本文介绍了如何改造Matrix支持冷启动耗时方法监测。让你一分钟就能给App启动卡顿号脉。

1. 接入Tencent Matrix

1.1 在你项目根目录下的 gradle.properties 中配置要依赖的 Matrix 版本号，如：

MATRIX_VERSION=1.0.0

1.2 在你项目根目录下的 build.gradle 文件添加 Matrix 依赖，如：

dependencies {
      classpath ("com.tencent.matrix:matrix-gradle-plugin:${MATRIX_VERSION}") { changing = true }
  }

1.3 在 app/build.gradle 文件中添加 Matrix 各模块的依赖，如：

  dependencies {
    implementation group: "com.tencent.matrix", name: "matrix-android-lib", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-android-commons", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-trace-canary", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-resource-canary-android", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-resource-canary-common", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-io-canary", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-sqlite-lint-android-sdk", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-battery-canary", version: MATRIX_VERSION, changing: true
    implementation group: "com.tencent.matrix", name: "matrix-hooks", version: MATRIX_VERSION, changing: true
  }

  apply plugin: 'com.tencent.matrix-plugin'
  matrix {
    trace {
        enable = true	//if you don't want to use trace canary, set false
        baseMethodMapFile = "${project.buildDir}/matrix_output/Debug.methodmap"
        blackListFile = "${project.projectDir}/matrixTrace/blackMethodList.txt"
    }
  }

1.4 实现 PluginListener，接收 Matrix 处理后的数据, 如：

class MatrixListener(context: Context?) : DefaultPluginListener(context) {
    companion object {
        const val TAG: String = "Matrix.TestPluginListener"
    }

    override fun onReportIssue(issue: Issue) {
        super.onReportIssue(issue)
        MatrixLog.e(TAG, issue.toString())

    }
}

1.5 实现动态配置接口， 可修改 Matrix 内部参数. 在 sample-android 中 我们有个简单的动态接口实例DynamicConfigImplDemo.java, 其中参数对应的 key 位于文件 MatrixEnum中， 摘抄部分示例如下：

  class MatrixConfig : IDynamicConfig {
    val isFPSEnable: Boolean
        get() = true
    val isTraceEnable: Boolean
        get() = true
    val isMatrixEnable: Boolean
        get() = true

    override fun get(key: String, defStr: String): String {

        // for Activity leak detect
        if (ExptEnum.clicfg_matrix_resource_detect_interval_millis.name == key || ExptEnum.clicfg_matrix_resource_detect_interval_millis_bg.name == key) {
            Log.d(
                "DynamicConfig",
                "Matrix.ActivityRefWatcher: clicfg_matrix_resource_detect_interval_millis 10s"
            )
            return TimeUnit.SECONDS.toMillis(5).toString()
        }
        if (ExptEnum.clicfg_matrix_resource_max_detect_times.name == key) {
            Log.d(
                "DynamicConfig",
                "Matrix.ActivityRefWatcher: clicfg_matrix_resource_max_detect_times 5"
            )
            return 3.toString()
        }
        return defStr
    }

    override fun get(key: String, defInt: Int): Int {
        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.
        if (MatrixEnum.clicfg_matrix_resource_max_detect_times.name == key) {
            MatrixLog.i(TAG, "key:$key, before change:$defInt, after change, value:2")
            return 2 //new value
        }
        if (MatrixEnum.clicfg_matrix_trace_fps_report_threshold.name == key) {
            return 10000
        }
        if (MatrixEnum.clicfg_matrix_trace_fps_time_slice.name == key) {
            return 12000
        }
        if (ExptEnum.clicfg_matrix_trace_app_start_up_threshold.name == key) {
            return 3000
        }
        return if (ExptEnum.clicfg_matrix_trace_evil_method_threshold.name == key) {
            200
        } else defInt
    }

    override fun get(key: String, defLong: Long): Long {
        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.
        if (MatrixEnum.clicfg_matrix_trace_fps_report_threshold.name == key) {
            return 10000L
        }
        if (MatrixEnum.clicfg_matrix_resource_detect_interval_millis.name == key) {
            MatrixLog.i(TAG, "$key, before change:$defLong, after change, value:2000")
            return 2000
        }
        return defLong
    }

    override fun get(key: String, defBool: Boolean): Boolean {
        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.
        return defBool
    }

    override fun get(key: String, defFloat: Float): Float {
        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.
        return defFloat
    }

    companion object {
        private const val TAG = "Matrix.DynamicConfigImplDemo"
    }
}

1.6 选择程序启动的位置对 Matrix 进行初始化，如在 Application 的继承类中， Init 核心逻辑如下：

  Matrix.Builder builder = new Matrix.Builder(application); // build matrix
  builder.patchListener(new TestPluginListener(this)); // add general pluginListener
  DynamicConfigImplDemo dynamicConfig = new DynamicConfigImplDemo(); // dynamic config
  
  // init plugin 
  IOCanaryPlugin ioCanaryPlugin = new IOCanaryPlugin(new IOConfig.Builder()
                    .dynamicConfig(dynamicConfig)
                    .build());
  //add to matrix               
  builder.plugin(ioCanaryPlugin);
  
  //init matrix
  Matrix.init(builder.build());

  // start plugin 
  ioCanaryPlugin.start();

2. 改造Application子类

2.1 模拟Application卡顿

private fun A() {
        B()
        H()
        L()
        SystemClock.sleep(800)
    }

    private fun B() {
        C()
        G()
        SystemClock.sleep(200)
    }

    private fun C() {
        D()
        E()
        F()
        SystemClock.sleep(100)
    }

    private fun D() {
        SystemClock.sleep(20)
    }

    private fun E() {
        SystemClock.sleep(20)
    }

    private fun F() {
        SystemClock.sleep(20)
    }

    private fun G() {
        SystemClock.sleep(20)
    }

    private fun H() {
        SystemClock.sleep(20)
        I()
        J()
        K()
    }

    private fun I() {
        SystemClock.sleep(20)
    }

    private fun J() {
        SystemClock.sleep(6)
    }

    private fun K() {
        SystemClock.sleep(10)
    }


    private fun L() {
        SystemClock.sleep(10000)
    }

2.2 Application.onCreate()调用卡顿方法

override fun onCreate() {
  A()
}

2.3 反射获取ActivityThread的mHandler

override fun attachBaseContext(base: Context?) {
      super.attachBaseContext(base)
      println("zijiexiaozhan MyApp attachBaseContext")
      time1 = SystemClock.uptimeMillis()
      time3 = System.currentTimeMillis()

      try {
          val forName = Class.forName("android.app.ActivityThread")
          val field = forName.getDeclaredField("sCurrentActivityThread")
          field.isAccessible = true
          val activityThreadValue = field[forName]
          val mH = forName.getDeclaredField("mH")
          mH.isAccessible = true
          val handler = mH[activityThreadValue]
          mHandler = handler as Handler
      } catch (e: Exception) {
      }
}

2.4 将原来的onCreate的方法调用转入匿名内部类调用

inner class ApplicationTask : Runnable {
    override fun run() {
        A()
    }
}

2.5 重写Application onCreate方法

override fun onCreate() {
    super.onCreate()
    //重点
    mHandler.postAtFrontOfQueue(ApplicationTask())
}

3.运行，快速定位

3.1 关键字"Trace_EvilMethod"查找日志

tag[Trace_EvilMethod]type[0];key[null];content[{"machine":"MIDDLE","cpu_app":0,"mem":3822452736,"mem_free":1164132,"detail":"NORMAL","cost":1344,"usage":"0.37%","scene":"default","stack":"0,1048574,1,1344\n1,5471,1,1338\n2,17582,1,1338\n3,17558,1,1338\n4,17560,1,379\n5,17562,1,160\n6,17563,1,17\n6,17566,1,20\n6,17568,1,20\n5,17569,1,20\n4,17573,1,56\n5,17575,1,21\n5,17576,1,5\n5,17578,1,10\n4,17580,1,102\n","stackKey":"17558|","tag":"Trace_EvilMethod","process":"com.peter.viewgrouptutorial","time":1624837969986}]

3.2 解析日志 打印卡顿堆栈

android.os.Handler dispatchMessage 1344
.com.peter.viewgrouptutorial.MyApp$ApplicationTask run 1338
..com.peter.viewgrouptutorial.MyApp access$A 1338
...com.peter.viewgrouptutorial.MyApp A 1338
....com.peter.viewgrouptutorial.MyApp B 379
.....com.peter.viewgrouptutorial.MyApp C 160
......com.peter.viewgrouptutorial.MyApp D 17
......com.peter.viewgrouptutorial.MyApp E 20
......com.peter.viewgrouptutorial.MyApp F 20
.....com.peter.viewgrouptutorial.MyApp G 20
....com.peter.viewgrouptutorial.MyApp H 56
.....com.peter.viewgrouptutorial.MyApp I 21
.....com.peter.viewgrouptutorial.MyApp J 5
.....com.peter.viewgrouptutorial.MyApp K 10
....com.peter.viewgrouptutorial.MyApp L 102

总结

到此这篇关于快速定位Android启动耗时问题的文章就介绍到这了,更多相关定位Android启动耗时内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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